For the given type of input to this layer, what preprocessor (if any) is required?
Returns null if no preprocessor is required, otherwise returns an appropriate InputPreProcessor
for this layer, such as a CnnToFeedForwardPreProcessor

getPreProcessorForInputType

For the given type of input to this layer, what preprocessor (if any) is required?
Returns null if no preprocessor is required, otherwise returns an appropriate InputPreProcessor
for this layer, such as a CnnToFeedForwardPreProcessor